MAINTENANCE 49
SPARK PLUGS
(2-Stroke Models)
NOTE: Always use the recom-
mended spark plugs in the engine.
See the appropriate specifications
chart for correct spark plug gap.
Varying terrain conditions and operat-
ing usage may require spark plugs of a
different heat range. For example, sus-
tained cross-country riding will usually
require colder heat-range spark plugs
while trail riding or other continual
slow speed operation will usually
require hotter heat-range spark plugs.
Removing/Installing
Spark Plugs (Crossfire/
M-Series Models)
1. Remove the springs securing the
expansion chamber to the exhaust
manifold and resonator; then move
the expansion chamber out of the
way to access the spark plugs.
2. Remove the spark plug caps from
the plugs.
3. Using a spark plug wrench,
remove the plugs.
4. Install the plugs and finger-tighten.
5. Tighten the spark plugs to 19 ft-lb;
then install the spark plug caps.
6. Place the expansion chamber into
position and secure to the exhaust
manifold and resonator with the
springs.
Removing/Installing
Spark Plugs (Bearcat
570/570 XT - F-Series/
T-Series Models)
1. Remove the two torx-head screws
securing the console to the head-
light support bracket.
0743-428
2. Lift the rearward end of the con-
sole and disconnect the main/hood
harness connector; then remove
the console.
3. Remove the spark plug caps from
the plugs.
4. Using a spark plug wrench,
remove the plugs.
5. Install the plugs and finger-tighten.
6. Tighten the spark plugs to 19 ft-lb;
then install the spark plug caps.
7. Place the console into position on
the headlight support bracket
keeping the rearward end slightly
elevated; then connect the main/
hood harness connector.
8. Lower the rearward end of the
console into position; then install
the two torx-head screws. Tighten
securely.
Checking Spark Plugs
(2-Stroke Models)
To see if the spark plugs being used are
of the proper heat range (after the
snowmobile has been operated under
normal driving conditions), remove the
spark plugs and examine the condition
of the center electrode insulator of each
spark plug.
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